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1
An abundant number is less than the sum of its factors ( other than itself). Which is the least abundant number ?
8
12
15
18
2
Four bells ring at intervals of 6, 7, 8 and 9 seconds respectively. All the bells ring together after ________________ seconds.
504
516
508
512
3
What is the LCM of two prime numbers?
Their addition
Their product
Their division
4
Least common multiple of 4 and 9 is
32
40
45
36
5
Prime factorisation of 143 are:
2 X 11 X 13
11 X 13
2 X 3 X 7
None of these
6
A numbers which is a factor of every number is:
0
none of these
7
Find the least number which when divided by 12, 15, 18 and 20 leaves remainder 5 in each case.
180
185
160
155
Find the smallest number of five digits which is exactly divisible by 60, 90 and 80
10000
10040
10080
10100
9
Consider the following statements:
Which of the above statement is/are false?
Only (i)
Only (ii)
Only (iii)
All three are false
10
Find the greatest number, which when divides 15 , 21 and 27, leaves the same remainder in each case.
11
L.C.M. of two co-prime numbers is their:
sum
difference
product
quotient
There are 56 students in section A and 58 students in section B of a class in a school. Find the minimum number of books required for their class library so that they can be distributed equally among the students of section A or section B.
1600
1624
812
406
13
Find the smallest number which leaves remainder 8 and 12 when divided by 28 and 32 respectively.
224
896
204
876
14
Bhushan counted to 60 using multiples of 6. Which statement is true about multiples of 6?
They are all 6 in the ones place
They all have 6 in the ones place
They can all be divided evenly by 3
They can all be divided evenly by 12
Consider the following statements.
(i) Every number is a factor of itself.
(ii) Every number is multiple of itself.
Which statement is the correct?
Both (i) and (ii)
Neither (i) nor (ii)
16
Between which multiple of 10 does 3486 lie?
3480,3500
3460,3480
3480,3490
3470,3480
17
There are four prime numbers written in ascending order. The product of the first three is 385 and that last three is 1001. The first number is
Match the following
(p) 2
A t; B s; C q; D r; E p
A s; B t; C p; D q; E r
A s; B t; C q; D p; E r
A t; B s; C P; D r; E q
19
In a groups of cows and ducks, the number of legs was 48. If the number of heads of ducks was 8, find the number of cows in the group.
20
Two tankers contain 850 litres and 680 litres of petrol respectively . Find the maximum capacity of container which can measure the petrol of either tanker in exact number of times .
170
25
None of these.