In a group of cows and hens, the number of legs are 14 more than twice the number of heads. The number of cows is

Clearly, number of ways of arranging 5 books = 5 ! = 5 x 4 x 3 x 2 x 1 = 120.

So, total time taken = 120 minutes = 2 hours.

Let the total number of sweets be (25x + 8).

Then, (25x + 8) - 22 is divisible by 28

⟺ (25x - 14) is divisible by 28 ⟺ 28x - (3x + 14) is divisible by 28

⟺ (3x + 14) is divisible by 28 ⟺ x = 14.

Therefore Total number of sweets = (25 x 14 + 8) = 358.

'Jade' is a 'green' precious stone in the same way 'Garnet' is a 'red' precious stone.

As 'Flower' is made from 'Bud' similarly 'Fruit' is made from 'Flower'.

Let the ten's digit be x. Then, unit's digit = (11 - x).

So, number = 10x + (11 - x) = 9x + 11.

Therefore (9x + 11) + 27 = 10 (11 - x) + x ⟺ 9x + 38 = 110 - 9x ⟺ 18x = 72 ⟺ x = 4.

Thus, ten's digit = 4 and unit's digit = 7.

Hence, required number = 47.

Clearly, total number of handshakes = (9+ 8 + 7 + 6 + 5 + 4 + 3 + 2+1) = 45.

Net ascent of the monkey in 1 hour = (30 - 20) feet = 10 feet.

So, the monkey ascends 90 feet in 9 hours i.e. till 5 p.m.

Clearly, in the next 1 hour i.e. till 6 p.m. the monkey ascends remaining 30 feet to touch the flag.

Clearly, out of every 16 persons, there is one captain. So, number of captains (1200/16) = 75.