Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,565

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

Good attempt, Monox D. I-Fly! In the final step, you missed to add 1.

SP#456. What well be the 33rd term of the sequence 1, 7, 25, 79, ....?

(a)

(b) .

(c) .

(d) None of these.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

.

SP#457. The sides of a right angled triangle 6, 8, and 10 centimeters respectively. A new right angled triangle is made by joining the mid-points of all the sides. This process continues infinitely then, calculate the area of all the triangles so formed.

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

SP#458. Find the 20th term of the sequence

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

.

SP#459. If p, q, r are in Geometric Progression, which is true among the following?

.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

.

#SP460. Find the sum of the following series:

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

.

SP#461. Find the sum of the series:

1 + 2 + 3 + 4 + 5 + ......... + 5600.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

.

SP#462. Find the sum : 2 + 4 + 6 + 8 + ... up to 15 terms.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

.

SP#463. Determine the sum of 6th and 19th term of the Arithmetic Progression 4, 9, 14, ......, 119 with 24 terms.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,565

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

The solution SP#463 is correct. Neat work, Monox D. I-Fly!

SP#464. In an Arithmetic Progression, if common difference d = -4, number of term n = 7, and nth term

= 4, find a, the first term.Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

SP#465. Find the 11th term of the Arithmetic Progression:

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**math9maniac****Member**- From: Tema
- Registered: 2015-03-30
- Posts: 419

Only a friend tells you your face is dirty.

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,565

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

The solution SP#465 is correct. Excellent, math9maniac, and Monox D. I-Fly!

SP#466. Find the 21st term of an Arithmetic Progression whose first two terms are -3 and 4.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,565

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

Good attempt, Monox D. I-Fly!

SP#467. If the 2nd term of an Arithmetic Progression is 13 and 5th term is 25, what is it's 7th term?

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,565

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

.

The solution SP#467 is correct. Excellent, Monox D. I-Fly!

SP#468. If nth term of an Arithmetic Progression is (2n + 1), what is the sum of its first three terms?

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

.

SP#469. Find the 20th term from the last term of the Arithmetic Progression 3, 8, 13, ...., 253.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

.

SP#470. An Arithmetic Progression consists of 50 terms of which 3rd term is 12 and the last term is 106. Find the 29th term.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,565

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

The solution SP#470 is correct. Excellent, Monox D. I-Fly!

SP#471. What is the common difference of an Arithmetic Progression in which

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**Monox D. I-Fly****Member**- From: Indonesia
- Registered: 2015-12-02
- Posts: 1,565

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 27,871

Hi,

The solution SP#471 is correct. Neat work, Monox D. I-Fly!

SP#472. How many terms of an Arithmetic Progression 9, 17, 25, ... must be taken to give a sum of 636?

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline