alleryThe operator & gives the average of two numbers. Find 14 & 6.
- 10
- 12
- 8
- 20
Show answer and solution
Correct answer: A. 10
The sum is 20 and half of it is 10.
RRB NTPC Order of Operations — practice questions — page 3
Explore 76 free Order of Operations questions in RRB NTPC Reasoning. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 61–76 of 76.
The operator & gives the average of two numbers. Find 14 & 6.Read the answer and worked solution →Using a ∗ b = a + 2b, evaluate (2 ∗ 3) ∗ 4 by clearing the bracket first.Read the answer and worked solution →If a ⊙ b is the product of a and b increased by 1, 3 ⊙ 5 isRead the answer and worked solution →Under a ∗ b = 2a − b, calculate 7 ∗ (3 ∗ 4).Read the answer and worked solution →Operation a # b = a² − b is given, and x # 3 = 13. Find positive x.Read the answer and worked solution →Using a @ b = a + b², determine 2 @ 3.Read the answer and worked solution →A binary rule gives a ∗ b = ab ÷ (a + b). Find 6 ∗ 3.Read the answer and worked solution →Fill the two blanks with signs, in order, so that 8 _ 4 _ 2 = 10.Read the answer and worked solution →Choose the signs that balance the equation 6 _ 3 _ 2 = 20.Read the answer and worked solution →Which signs, left to right, complete 12 _ 4 _ 5 = 8 correctly?Read the answer and worked solution →To make 5 _ 4 _ 2 equal 18, the blanks must holdRead the answer and worked solution →Pick the sign pair that balances 15 _ 3 _ 2 = 3.Read the answer and worked solution →Fill in the blank so that 36 ÷ 6 + ? = 10 holds.Read the answer and worked solution →What number replaces the question mark in ? × 4 − 6 = 22?Read the answer and worked solution →Find ? if 48 ÷ ? + 5 = 13.Read the answer and worked solution →A number divided by 3 and then increased by 7 gives 15. What is it?Read the answer and worked solution →
Worked practice questions
Using a ∗ b = a + 2b, evaluate (2 ∗ 3) ∗ 4 by clearing the bracket first.
- 12
- 10
- 16
- 24
Show answer and solution
Correct answer: C. 16
2 ∗ 3 = 2 + 6 = 8, and 8 ∗ 4 = 8 + 8 = 16.
If a ⊙ b is the product of a and b increased by 1, 3 ⊙ 5 is
- 8
- 16
- 35
- 15
Show answer and solution
Correct answer: B. 16
3 × 5 = 15 and 15 + 1 = 16.
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