Factorize the expression: am + bn - an - bm
(a - b)(m + n)
(a - b)(m - n)
(a + b)(m - n)
(a + b)(m + n)
Correct answer is B
am + bn - an - bm am - an - bm + bn a(m - n) - b(m - n) (a - b)(m - n)
0.46m
0.60m
0.87m
1.80m
Correct answer is B
volume of cylinder = \(\pi r^2\)h
0.216\(\pi\) m\(^3\) = \(\pi \times r^2 \times h\)
Since r = h,
0.216 = r\(^3\)
r\(^3\) = 0.216
r = \(\sqrt[3]{0.216}\)
= 0.6
What is the value of 3 in the number 42.7531?
\(\frac{3}{10000}\)
\(\frac{3}{1000}\)
\(\frac{3}{100}\)
\(\frac{1}{10}\)
Correct answer is B
No explanation has been provided for this answer.
The length of a piece of stick is 1.75m. A girl measured it as 1.80m. Find the percentage error
\(\frac{28}{7}\)%
\(\frac{29}{7}\)%
5%
\(\frac{20}{7}\)%
Correct answer is D
Error = 1.80m - 1.75m = 0.05m
%error = \(\frac{\text{error}}{\text{true measurement}}\) x 100%
45o
60o
75o
90o
Correct answer is A
Perimeter of sector = 2r + \(\frac{\theta}{360^o} \times 2\pi r\)
\(\pi + 8 = 2 \times 4 + \frac{\theta}{3360^o} \times 2 \pi \times 4\)
\(\pi + 8 + \frac{\theta}{360^o} \times 8 \pi\)
P + 8 - 8 = \(\frac{\theta \pi}{456o}\)
\(\pi = \frac{\theta \pi}{45^o}\)
\(\theta \pi = 45^o\)