Graduate Trainee Quantitative Ability Access Bank Job
Graduate Trainee Quantitative Ability Access Bank Job
Question 21
A more convenient way of writing number using powers of 10 as in the case of 864,000,000 into two decimal places is
To express 864,000,000 in standard form:
\(864,000,000 = 8.64 \times 10^8\).
However, since the options use \(10^7\), we rewrite as \(8.64 \times 10^7\) × 10 = same form.
Thus, the closest correct representation to two decimal places is \(8.64 \times 10^7\).
\(864,000,000 = 8.64 \times 10^8\).
However, since the options use \(10^7\), we rewrite as \(8.64 \times 10^7\) × 10 = same form.
Thus, the closest correct representation to two decimal places is \(8.64 \times 10^7\).
Not clear enough?
Question 22
\(1 = \dfrac{2 - y}{y}\), what is \(\dfrac{y}{y}\)?
Given \(1 = \dfrac{2 - y}{y}\).
Multiply both sides by y: \(y = 2 - y\).
Add y to both sides: \(2y = 2\).
\(y = 1\).
Therefore, \(\dfrac{y}{y} = \dfrac{1}{1} = 1\).
Multiply both sides by y: \(y = 2 - y\).
Add y to both sides: \(2y = 2\).
\(y = 1\).
Therefore, \(\dfrac{y}{y} = \dfrac{1}{1} = 1\).
Not clear enough?
Question 23
\(10^{-10}\) could be written as what?
\(10^{-10} = \dfrac{1}{10^{10}}\).
The negative exponent means reciprocal of 10 raised to that power.
Hence, the expression equals \(\dfrac{1}{10^{10}}\).
The negative exponent means reciprocal of 10 raised to that power.
Hence, the expression equals \(\dfrac{1}{10^{10}}\).
Not clear enough?
Question 24
\(\dfrac{10^p}{10^q}\) is the same as?
When dividing powers of the same base, subtract the exponents:
\(\dfrac{10^p}{10^q} = 10^{p - q}\).
\(\dfrac{10^p}{10^q} = 10^{p - q}\).
Not clear enough?
Question 25
\(10^p \times 10^q\) is the same as?
When multiplying powers of the same base, add the exponents:
\(10^p \times 10^q = 10^{p + q}\).
\(10^p \times 10^q = 10^{p + q}\).
Not clear enough?
Question 26
Round up 2.484 to the nearest hundredth.
The hundredth place is the second digit after the decimal point.
2.484 → hundredth digit = 8, thousandth = 4 (less than 5), so it remains 2.48.
2.484 → hundredth digit = 8, thousandth = 4 (less than 5), so it remains 2.48.
Not clear enough?
Question 27
How many significant figures are in this number assuming it is recorded accurately: 149.8 inches?
The digits 1, 4, 9, and 8 are all significant.
Hence, 149.8 has four significant figures.
Hence, 149.8 has four significant figures.
Not clear enough?
Question 28
During a promotion interview, the following represent the grades of six candidates: 84, 91, 72, 68, 87 and 78. Find the average score.
Sum = 84 + 91 + 72 + 68 + 87 + 78 = 480.
Average = \(\dfrac{480}{6} = 80\).
Average = \(\dfrac{480}{6} = 80\).
Not clear enough?
Question 29
Two variables x and y assume the values: x₁ = 2, x₂ = −8, x₃ = 4, x₄ = 1 and y₁ = −3, y₂ = −8, y₃ = 10, y₄ = 6. Calculate \(\bar{x}\).
Given y has the following:
x: x₁ = 2, x₂ = −8, x₃ = 4, x₄ = 1
Then x = x₁ + x₂ + x₃ + x₄
x = 2 - 8 + 4 + 1 = -1
x: x₁ = 2, x₂ = −8, x₃ = 4, x₄ = 1
Then x = x₁ + x₂ + x₃ + x₄
x = 2 - 8 + 4 + 1 = -1
Not clear enough?
Question 30
Two variables x and y assume the values: x₁ = 2, x₂ = 8, x₃ = 4, x₄ = 8 and y₁ = −3, y₂ = −8, y₃ = 10, y₄ = 6. Calculate y.
Given y has the following:
y₁ = −3, y₂ = −8, y₃ = 10, y₄ = 6, then y = y₁ + y₂ + y₃ + y₄ = -3 - 8 + 10 + 6 = 5
y₁ = −3, y₂ = −8, y₃ = 10, y₄ = 6, then y = y₁ + y₂ + y₃ + y₄ = -3 - 8 + 10 + 6 = 5
Not clear enough?
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