Q.1.
Add the first figure to the quotient of the last two (the middle figure is the dividend and the last is the divisor): 78, 56, 4
Q.2.
Multiply the first figure by the sum of the last two: 21, 3, 7
Q.3.
Add the first figure to the product of the last two: 48, 3, 15
Q.4.
Subtract the first figure from the quotient of the last two (the last figure is the dividend and the middle one is the divisor): 16, 3, 60
Q.5.
Multiply the second figure by the sum of the first and last: 9, 8, 6
Q.6.
Subtract the first figure from the second, then multiply your answer by the third: 26, 45, 3
Q.7.
Multiply the last figure by the sum of the first two: 8, 17, 8
Q.8.
Subtract the third figure from the quotient of the first two (the first figure is the dividend and the second is the divisor): 144, 6, 13
Q.9.
Subtract the first figure from the product of the last two: 100, 7, 19
Q.10.
Add the last figure to the product of the first two: 11, 2, 43