Standard form - Jamb Mathematics Past Questions and Answers

Question 6:

• JAMB 2014

Express the product of 0.00043 and 2000 in standard form.

A. 8.6 x 10^-3
B. 8.3 x 10^-2
C. 8.6 x 10^-1
D. 8.6 x 10

Question 7:

• JAMB 1979

$(1.28\times {10}^4)÷(6.4\times {10}^2)$ equals

A. 2 x 10^-5
B. 2 x 10^-1
C. 2 x 10¹
D. 2 x 10^-4

Question 8:

• JAMB 1983

If 0.0000152 x 0.042 = A x 10⁸, where 1 $\le$ A < 10, find A and B

A. A = 9, B = 6.38
B. A = 6.38, B = -9
C. A = -6.38, B = -9
D. A = -9, B = -6.38

Question 9:

• JAMB 1984

Find, without using logarithm tables, the value of $\frac{lo{g}_{3}27-lo{g}_{\frac{1}{4}}64}{lo{g}_3\frac{1}{81}}$

A. $\frac{-3}{9}$
B. $\frac{-3}{2}$
C. $\frac{6}{11}$
D. $\frac{43}{78}$

Question 10:

• JAMB 1989

Evaluate 2700 000 x 0.03 + 18 000

A. 4.5 x 10⁰
B. 4.5 x 10¹
C. 4.5 x 10²
D. 4.5 x 10³