Calculations

Calculations Worksheet-4

1. The unit's digit in the product 274 × 318 × 577 × 313 is :

(a) 2                    (b) 3                    (c) 4                    (d) 5

2. The digit in unit's place of the product 81 × 82 × .... × 89 is :

(a) 0                    (b) 2                    (c) 6                    (d) 8

Calculations Worksheet-5

1. The value of (11² + 12² + 13² + 14² + ..... + 20²) is :

(a) 385               (b) 2485             (c) 2870             (d) 3255

2. If 1*548 is divisible by 3, which of the following digits can replace * ?

(a) 0                    (b) 2                    (c) 7                    (d) 5

Calculations Worksheet-6

1. The digits indicated by * and $ in 3422213*$ so that this number is divisible by 99, are respectively :

(a) 1, 9                (b) 3, 7               (c) 4, 6                (d) 5, 5

2. If x and y are the two digits of the number 653xy such that this number is divisible by 80, then x + y is equal to :

(a) 2                    (b) 3                    (c) 4                    (d) 6

3. How many of the following numbers are divisible by 132 ?

264, 396, 462, 792, 968, 2178, 5184, 6336