RRB Junior Engineer (JE) Sample Paper: Mathematics-12

1. Find the unit digit in the expansion of 325445.

(a) 0
(b) 5
(c) 1
(d) 2

2. Find the unit digit in the expansion of 314448.

(a) 6
(b) 4
(c) 8
(d) 2

2. A worker was engaged for a certain number of days and was promised to be paid ` 1755. He remained absent for some days and was paid 1365 only. What were his daily wages ?

(a) ` 182
(b) ` 195
(c) ` 185
(d) ` 192

4. Which of the following cannot be a digit in the unit’s place of a perfect square ?

(a) 7
(b) 1
(c) 5
(d) 0

5. The smallest number, which when added to the sum of square of 9 to 10 gives a perfect square is

(a) 0
(b) 3
(c) 8
(d) 15

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1(b), 2(a), 3(b), 4(a), 5(d)