A classroom of 32 students contains an equal number of boys and girls. when two boys rush out to visit a restroom, and several girls run out to chat, that leaves twice as many boys as girls in the classroom. Now, the class has 12 14 7 18( 12, 14, 7, 18 ) boys and 7 14 16 17( 7, 14, 16, 17 ) girls and the total number of students at present in the classroom is 12 18 19 21( 12, 18, 19, 21 )

Raju built a display stack using 8 layers of cans as shown in the figure. The number of cans required to build 8th layer of the pyramid is 8 80 36 120( 8, 80, 36, 120 ). and the total number of cans required to build eight layer pyramid is 80 36 112 120( 80, 36, 112, 120 )

The seats on merry-go-round are numbered in the sequence 1,2,3...... Gary chooses seat 10, exactly opposite to Jane, who was sitting on seat 3. The total number of seats in this merry-go-round is 14 16 12 20( 14, 16, 12, 20 ) and the seat number opposite to seat 5 is 16 14 12 20( 16, 14, 12, 20 )