Basic Arithmetic

202 questions available

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All Number System 55 Fractions & Decimals 52 BODMAS & Simplification 53 Factors & Multiples 1 LCM & HCF 5 Divisibility 6 Approximation 30
Showing 181–200 of 202

Q181.Greatest prime factor of 87 is ?

Medium
A 20
B 29
C 40
D 25
Number System PPSC

Correct Answer: B

Factorizing 87 gives: 87 = 3 * 29. Since both 3 and 29 are prime numbers, the greatest prime factor is 29.

Q182.7/8 of 96 is?

Medium
A 72
B 80
C 84
D 88
Fractions & Decimals PPSC

Correct Answer: C

(7 / 8) * 96 = 7 * (96 / 8) = 7 * 12 = 84.

Q183.Find Odd one out: 2, 3, 7, 11 (Prime check)

Medium
A 2
B 5
C 7
D 11
Number System PPSC

Correct Answer: A

All of the numbers (2, 3, 7, 11) are prime numbers. However, 2 is the only even prime, whereas the others are odd primes.

Q184.What is X⁰ equal to?

Medium
A 0
B 1
C X
D Undefined
Number System PPSC

Correct Answer: B

Any non-zero number raised to the power of 0 is mathematically defined as 1.

Q185.Divide 1/4 + 1/4 =?

Medium
A 1/2
B 1/8
C 1/32
D None of these
Fractions & Decimals PPSC

Correct Answer: A

Adding equal fractions: 1/4 + 1/4 = 2/4 = 1/2.

Q186.1/8+1/8+1/8+1/8=?

Medium
A 1/2
B 1/4
C 2/3
D 3/4
Fractions & Decimals PPSC

Correct Answer: A

1/8 + 1/8 + 1/8 + 1/8 = 4/8 = 1/2.

Q187.On fifth of on tenth of one quarter of 250 is?

Medium
A 1.25
B 2.5
C 3.5
D 4.5
Fractions & Decimals PPSC

Correct Answer: A

Calculation: (1/5) * (1/10) * (1/4) * 250 = 250 / 200 = 1.25.

Q188.Complete the series: 3/5, 5/7, 7/9, ......?

Medium
A 9/11
B 9/4
C 8/11
D None of these
Fractions & Decimals PPSC

Correct Answer: A

Both numerators and denominators increase by 2: 3/5, 5/7, 7/9, 9/11.

Q189.What is the largest 4-digit number exactly divisible by 88?

Medium
A 8088
B 9944
C 8888
D 9988
Divisibility PPSC

Correct Answer: B

The largest 4-digit number is 9999. 9999 ÷ 88 = 113.625. Earning integer product: 113 × 88 = 9944.

Q190.Solve: 0.00896 × 0.70

Medium
A 0.006272
B 0.06272
C 0.0006272
D 0.6272
Fractions & Decimals PPSC

Correct Answer: A

896 × 70 = 62720. Shifting the decimal 7 places left gives 0.006272.

Q191.What is the decimal form of 3/50?

Medium
A 0.04
B 0.05
C 0.06
D 0.08
Fractions & Decimals PPSC

Correct Answer: C

3 ÷ 50 = 0.06.

Q192.Solve: 0.525 + 0.2 + 0.5

Medium
A 1.125
B 1.205
C 1.225
D 1.250
Fractions & Decimals PPSC

Correct Answer: C

0.525 + 0.2 + 0.5 = 1.225.

Q193.Write the base of the exponential term -(-5)^2?

Medium
A 2
B 5
C -5
D
Number System PPSC

Correct Answer: C

In the term -(-5)^2, the base being raised to the power of 2 is -5.

Q194.Evaluate: 4 + 4/4 = ?

Medium
A 20
B 2
C 4
D 5
BODMAS & Simplification PPSC

Correct Answer: D

By BODMAS, division comes first: 4 / 4 = 1. Then addition: 4 + 1 = 5.

Q195.Simplify: 3*sqrt(27)

Medium
A 2*sqrt(7)
B 9*sqrt(3)
C 3*sqrt(5)
D None of these
Number System PPSC

Correct Answer: B

3 * sqrt(27) = 3 * sqrt(9 x 3) = 3 * 3 * sqrt(3) = 9*sqrt(3).

Q196.Simplify the fraction 14/35.

Medium
A 3/5
B 2/5
C 5/5
D
Fractions & Decimals PPSC

Correct Answer: B

Dividing both numerator and denominator by their GCD of 7 gives 2/5.

Q197.The square of -9 is:

Medium
A -81
B 81
C 18
D -18
Number System PPSC

Correct Answer: B

(-9)² = (-9) * (-9) = 81.

Q198.Write the base of the exponential term -(-6)^5?

Medium
A 6
B -6
C -6x5
D 5
Number System PPSC

Correct Answer: B

In the term -(-6)^5, the base being raised to the power of 5 is -6.

Q199.Which of the following is not a rational number?

Medium
A 4
B 0.3
C under root 3
D 0
Number System PPSC

Correct Answer: C

Under root 3 (sqrt(3)) is an irrational number because its decimal form is non-terminating and non-repeating.

Q200.Which value of x will make the equation true: 3^x = 243?

Medium
A 3
B 5
C 8
D 9
Number System PPSC

Correct Answer: B

Since 243 can be factored as 3 × 3 × 3 × 3 × 3 = 3⁵, equating the powers of 3^x = 3⁵ gives x = 5.