4, 6, 8, 9, 10, 11, 12
Question:
4, 6, 8, 9, 10, 11, 12
[A].
10
11
12
9
4, 6, 8, 9, 10, 11, 12
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
Each number is a composite number except 11.
Similar Posts
The sum of first 45 natural numbers is:
Question:
The sum of first 45 natural numbers is:
[A].1035 [B].
1280 [C].
2070 [D].
2140 Answer: Option A
Explanation:
Let Sn = (1 + 2 + 3 + … + 45)
This is an A.P. in which a = 1, d = 1, n = 45 and l = 45
Sn = n (a + l) = 45 x (1 + 45) = (45 x 23) = 1035 2 2 Required sum = 1035.
36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work?
Question:
36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work?
[A].12 [B].
18 [C].
22 [D].
24 Answer: Option D
Explanation:
Let the required number of days be x.
Less men, More days (Indirect Proportion)
27 : 36 :: 18 : x 27 x x = 36 x 18
x = 36 x 18 27 x = 24.
If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?
Question:
If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?
[A].1 [B].
7 2 [C].
7 [D].
49 Answer: Option C
Explanation:
Let the required number days be x.
Less spiders, More days (Indirect Proportion)
Less webs, Less days (Direct Proportion)
Spiders 1 : 7 :: 7 : x Webs 7 : 1 1 x 7 x x = 7 x 1 x 7
x = 7.
587 x 999 = ?
Question:
587 x 999 = ?
[A].586413 [B].
587523 [C].
614823 [D].
615173 Answer: Option A
Explanation:
587 x 999 = 587 x (1000 – 1) = 587 x 1000 – 587 x 1 = 587000 – 587 = 586413. A number was divided successively in order by 4, 5 and 6. The remainders were respectively 2, 3 and 4. The number is:
Question:
A number was divided successively in order by 4, 5 and 6. The remainders were respectively 2, 3 and 4. The number is:
[A].214 [B].
476 [C].
954 [D].
1908 Answer: Option A
Explanation:
4 | x z = 6 x 1 + 4 = 10
———–
5 | y -2 y = 5 x z + 3 = 5 x 10 + 3 = 53
———–
6 | z – 3 x = 4 x y + 2 = 4 x 53 + 2 = 214
———–
| 1 – 4Hence, required number = 214.
0.04 x 0.0162 is equal to:
Question:
0.04 x 0.0162 is equal to:
[A].6.48 x 10-3 [B].
6.48 x 10-4 [C].
6.48 x 10-5 [D].
6.48 x 10-6 Answer: Option B
Explanation:
4 x 162 = 648. Sum of decimal places = 6.
So, 0.04 x 0.0162 = 0.000648 = 6.48 x 10-4