RRB NTPC CBT 1 December-7-2022 Exam Previous Question Paper with Solutions

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RRB NTPC

26) The LCM of two numbers is 210. If their HCF is 35 and one of the numbers is 105, find the other number.

A) 35
B) 70
C) 105
D) 140

View Answer
B) 70

Explanation:the two numbers be 105, y
LCM × HCF = 105× y
210 ×35 = 105 × y

27) When an object thrown straight upwards gets to the top of its path, its

A) Velocity is zero and it acceleration is zero
B) Velocity is zero and its acceleration is about 10 m/s2
C) Velocity is 10 m/s and its acceleration is zero
D) Velocity is 10 m/s and its acceleration is about 10 m/s2

View Answer
B) Velocity is zero and its acceleration is about 10 m/s2

Explanation:When an object thrown straight upwards gets to the top of its path, its Velocity is zero and its acceleration is about 10 m/s2

28) A positive number exceed its positive square root by 30. Find the number.

A) 16
B) 36
C) 25
D) 49

View Answer
B) 36

Explanation:x=\sqrt{x\;}+30__________i
x-30=\sqrt x
Squaring both side we get
x2+900-60x=x
x^2-61x+900=0
x2-25x+900=0
X=36, 25
Only x=36 satisfies (i)

29) Select the correct set of symbols:
21 9 13 7 = 195

A) x, –, ÷
B) +, ÷, –
C) +, –, ÷
D) ×, +, –

View Answer
D) ×, +, –

Explanation:21×9+13–7=195

30) In the Republic of India, the administrative head of a Union Territory is–

A) Lieutenant Governor
B) Governor
C) President
D) Prime Minister

View Answer
A) Lieutenant Governor

Explanation:Lieutenant-Governor is the administrative head of a Union Territory

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