# Missing Numbers Quiz Set 002

### Question 1

225, 336, 447, (?), 669, 7710,

A

114.

B

338.

C

558.

D

991.

Soln.
Ans: c

225, 336, 447, 558, 669, 7710. First two digits of each term are 22, 33, 44, 55, 66 and 77 respectively. While third digit of each term is 5, 6, 7, 8, 9, and 10 respectively.

### Question 2

Which one number is like the given number set (363, 489, 579)?

A

281.

B

382.

C

471.

D

562.

Soln.
Ans: c

Sum of digits of all these numbers is 3.In 363 → 3 + 6 + 3 = 12 = 1 + 2 = 3. In 363 → 4 + 8 + 9 = 21 = 2 + 1 = 3. In 363 → 5 + 7 + 9 = 21 = 2 + 1 = 3. Similarly, in 471 → 4 + 7 + 1 = 12 = 1 + 2 = 3

### Question 3 A

80.

B

114.

C

108.

D

None of these.

Soln.
Ans: c

(4 + 8) x 9 = 108. ∴ (5 + 4) x 12 = 108.

### Question 4

Directions : One number is wrong in the series. Find out the wrong number.

88, 54, 28, 13, 5, 2, 2

A

28

B

54

C

13

D

2

Soln.
Ans: b

Series moves from the right end with a difference of 0, 3, 8, 15, 24, 35 i.e., with a difference of numbers, which are one less than the square of successive natural numbers. Therefore, number 54 should be replaced by 53.

### Question 5

Examine this series: 2, 9, 45, 247.5, 1485. If another series is written with the same rule, what number would come in the place B: 3, A, B, C, D, E ?

A

64.5

B

72

C

75

D

67.5

Soln.
Ans: d

9 = 2 X 4.5, then 9 X (4.5 + 0.5) = 45, then 45 X 5.5 = 247.5, then 247.5 X 6 = 1485. Similarly, 3 X 4.5 = 13.5, then 13.5 X 5 = 67.5. 