Default Title

Question (1)

QN0030053

Which statement is always true about the first person in the height arrangement activity?

(A) They are the shortest.
(B) They always say 0.
(C) They always say the largest number.
(D) They are always the tallest.

Correct Answer: B

Explanation:

No one stands in front of the first person, so the number of taller people in front is always 0.

Link:

Report Error

Question (2)

QN0030054

Seven children stand in a line. The last child says 6. What can you conclude?

(A) The last child is the tallest.
(B) The last child is the shortest and everyone before is taller.
(C) Exactly six children are shorter than the last child.
(D) The arrangement is impossible.

Correct Answer: B

Explanation:

Saying 6 means all six children standing in front are taller than the last child.

Link:

Report Error

Question (3)

QN0030055

Which of the following sums is always odd?

(A) Three even numbers + one odd number
(B) Four odd numbers
(C) Two even numbers + two odd numbers
(D) Six even numbers

Correct Answer: A

Explanation:

Three even numbers add to an even number, and even + odd = odd.

Link:

Report Error

Question (4)

QN0030056

A student adds 7 odd numbers. The result must be

(A) Even
(B) Odd
(C) Prime
(D) Multiple of 4

Correct Answer: B

Explanation:

The sum of an odd number of odd numbers is always odd.

Link:

Report Error

Question (5)

QN0030057

Which grid will contain an odd number of small squares?

(A) 18 × 25
(B) 41 × 19
(C) 64 × 17
(D) 52 × 38

Correct Answer: B

Explanation:

A product is odd only when both factors are odd.

Link:

Report Error

Question (6)

QN0030058

If n is an integer, which expression is always even?

(A) 5n + 1
(B) 2n + 8
(C) 3n + 2
(D) n + 7

Correct Answer: B

Explanation:

Both 2n and 8 are even, so their sum is always even.

Link:

Report Error

Question (7)

QN0030059

The 75th even number is

(A) 148
(B) 149
(C) 150
(D) 152

Correct Answer: C

Explanation:

The nth even number is 2n. Therefore, the 75th even number is 2 × 75 = 150.

Link:

Report Error

Question (8)

QN0030060

What is the 60th odd number?

(A) 119
(B) 120
(C) 121
(D) 123

Correct Answer: A

Explanation:

The nth odd number is 2n − 1. Hence, 2 × 60 − 1 = 119.

Link:

Report Error

Question (9)

QN0030061

A 3 × 3 magic square is formed using the numbers 11 to 19. What is its magic sum?

(A) 39
(B) 45
(C) 75
(D) 57

Correct Answer: B

Explanation:

Adding 10 to every number increases each row sum by 30. Original magic sum = 15, so new magic sum = 45.

Link:

Report Error

Question (10)

QN0030062

A magic square has centre number 18. What is its magic sum?

(A) 36
(B) 45
(C) 54
(D) 60

Correct Answer: C

Explanation:

The magic sum of a 3 × 3 magic square is three times the centre number. Thus, 3 × 18 = 54.

Link:

Report Error

Question (1)

Which statement is always true about the first person in the height arrangement activity?

Explanation:

Link:

Question (2)

Seven children stand in a line. The last child says 6. What can you conclude?

Explanation:

Link:

Question (3)

Which of the following sums is always odd?

Explanation:

Link:

Question (4)

A student adds 7 odd numbers. The result must be

Explanation:

Link:

Question (5)

Which grid will contain an odd number of small squares?

Explanation:

Link:

Question (6)

If n is an integer, which expression is always even?

Explanation:

Link:

Question (7)

The 75th even number is

Explanation:

Link:

Question (8)

What is the 60th odd number?

Explanation:

Link:

Question (9)

A 3 × 3 magic square is formed using the numbers 11 to 19. What is its magic sum?

Explanation:

Link:

Question (10)

A magic square has centre number 18. What is its magic sum?

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY