If A = 1 ? 10 + 3 ? 12 + 5 ? 14 + 7 + ... upto 60 terms, then what is the value

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Question
If A = 1 ? 10 + 3 ? 12 + 5 ? 14 + 7 + ... upto 60 terms, then what is the value of A?
Options
A. ? 360
B. ? 310
C. ? 240
D. ? 270

Correct Answer

? 270

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1. Three numbers are in Arithmetic Progression (AP) whose sum is 30 and the product is 910. Then the greatest number in the AP is
Options
A. 17
B. 15
C. 13
D. 10

Discuss

Correct Answer: 13

2. What is the sum of the first 11 terms of an arithmetic progression if the 4th term is 11 and the 7th term is -4?
Options
A. -75
B. 55
C. 11
D. 100

Discuss

Correct Answer: 11

3. What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?
Options
A. 192
B. 230
C. 102
D. 214

Discuss

Correct Answer: 102

4. What least number must be added to 4131, so that the sum is completely divisible by 19?
Options
A. 10
B. 11
C. 9
D. 12

Discuss

Correct Answer: 11

5. The 3rd and 9th term of an arithmetic progression are -8 and 10 respectively. What is the 16th term?
Options
A. 34
B. 28
C. 25
D. 31

Discuss

Correct Answer: 31

6. If A = 232, B = 231+ 230+ 229+ ... + 20 and C = 315+ 314+ 313+ ... + 30 , then which of the following option is TRUE?
Options
A. C > B > A
B. C > A > B
C. A > B > C
D. A > C > B

Discuss

Correct Answer: C > A > B

7. If N = 1 + 11 + 111 + 1111 + ... +111111111, then what is the sum of the digit's of N?
Options
A. 45
B. 18
C. 36
D. 5

Discuss

Correct Answer: 45

8. What is the sum of first 40 terms of 1 + 3 + 4 + 5 + 7 + 7 + 10 + 9 + ....?
Options
A. 1010
B. 1115
C. 1030
D. 1031

Discuss

Correct Answer: 1030

9. Insert the missing number. 7, 26, 63, 124, 215, 342, (....)
Options
A. 391
B. 421
C. 481
D. 511

Discuss

Correct Answer: 511

Explanation:

Numbers are (2³ - 1), (3³ - 1), (4³ - 1), (5³ - 1), (6³ - 1), (7³ - 1) etc.

So, the next number is (8³ - 1) = (512 - 1) = 511.

10. Find the odd man out. 41, 43, 47, 53, 61, 71, 73, 81
Options
A. 41
B. 61
C. 71
D. 81

Discuss

Correct Answer: 81

Explanation:

Each of the numbers except 81 is a prime number.

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If A = 1 ? 10 + 3 ? 12 + 5 ? 14 + 7 + ... upto 60 terms, then what is the value of A?

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