Explanation

All pairs have a common factor greater than 1 except one.

56, 63 = Both divisible by 7

96, 108 = Both divisible by 12

16, 18 = Both divisible by 2

86, 99 = 86 = 2 x 43, 99 = 3 x 3 x 11 - No common factor

So 86, 99 does not belong to the group.

Last verified on 20-10-2026

Explanation

All pairs except one have a common property inside the pair.

18 = 1+8 = 9 and 45 = 4+5 = 9

27 = 2+7 = 9 and 36 = 3+6 = 9

14 = 1+4 = 5 and 23 = 2+3 = 5

In every pair the sum of digits of both numbers is equal.

In 29, 82

29 = 2+9 = 11

82 = 8+2 = 10

Sum is not equal.

So 29, 82 does not belong to the group.

Last verified on 20-10-2026

Explanation

Total vehicles = 160

Cars = 120, so Trucks = 160 - 120 = 40

Green Trucks = 18, so Red Trucks = 40 - 18 = 22

Total Red = 70, so Red Cars = Total Red - Red Trucks

= 70 - 22 = 48

Last verified on 20-10-2026

Explanation

A = {2,4,6,8,10}

B = {1,2,3,4,6,12}

A ∩ B = {2,4,6}

3 elements

Last verified on 20-10-2026

Explanation

2x - 6 = 24

2x = 30

x = 15

Last verified on 20-10-2026