52, 51, 48, 43, 34, 27, 16
Question:
52, 51, 48, 43, 34, 27, 16
[A].
27
34
43
48
52, 51, 48, 43, 34, 27, 16
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
Subtract 1, 3, 5, 7, 9, 11 from successive numbers.
So, 34 is wrong.
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The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?
Question:
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?
[A].4 [B].
8 [C].
16 [D].
None of these Answer: Option B
Explanation:
Since the number is greater than the number obtained on reversing the digits, so the ten’s digit is greater than the unit’s digit.
Let ten’s and unit’s digits be 2x and x respectively.
Then, (10 x 2x + x) – (10x + 2x) = 36
9x = 36
x = 4.
Required difference = (2x + x) – (2x – x) = 2x = 8.
The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one of the numbers is 275, then the other is:
Question:
The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one of the numbers is 275, then the other is:
[A].279 [B].
283 [C].
308 [D].
318 Answer: Option C
Explanation:
Other number = 11 x 7700 = 308. 275 1, 2, 6, 15, 31, 56, 91
Question: 1, 2, 6, 15, 31, 56, 91
[A].31 [B].
91 [C].
56 [D].
15 Answer: Option B
Explanation:
1, 1 + 12 = 2, 2 + 22 = 6, 6 + 32 = 15, 15 + 42 = 31, 31 + 52 = 56, 56 + 62 = 92
Last number of given series must be 92 not 91.
Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is:
Question:
Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is:
[A].15 [B].
16 [C].
18 [D].
25 Answer: Option B
Explanation:
Ratio of times taken by Sakshi and Tanya = 125 : 100 = 5 : 4.
Suppose Tanya takes x days to do the work.
5 : 4 :: 20 : x x = 4 x 20 5 x = 16 days.
Hence, Tanya takes 16 days to complete the work.
A man walked diagonally across a square lot. Approximately, what was the percent saved by not walking along the edges?
Question:
A man walked diagonally across a square lot. Approximately, what was the percent saved by not walking along the edges?
[A].20 [B].
24 [C].
30 [D].
33 Answer: Option C
Explanation:
Let the side of the square(ABCD) be x metres.
Then, AB + BC = 2x metres.
AC = 2x = (1.41x) m.
Saving on 2x metres = (0.59x) m.
Saving % = 0.59x x 100 % = 30% (approx.) 2x What decimal of an hour is a second ?
Question:
What decimal of an hour is a second ?
[A]..0025 [B].
.0256 [C].
.00027 [D].
.000126 Answer: Option C
Explanation:
Required decimal = 1 = 1 = .00027 60 x 60 3600