# Test: Factors II - Challenging

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Question 1:   Solve: ${\left(\frac{9}{25}\right)}^{\frac{1}{2}}+{\left(\frac{16}{25}\right)}^{\frac{1}{2}}-\sqrt{\frac{9}{25}+\frac{16}{25}}$
$\frac{2}{5}$
$1$
$0$
$\frac{1}{2}$
Question 2:   Solve: $\sqrt{0.09}+\sqrt{0.81}-\sqrt{0.49}$
$1$
$0.2$
$0.6$
$0.5$
Question 3:   Which of the following sets of numbers are the factors of  $129$ ?
$1,3,63,129$
$1,3,47,129$
$1,3,43,129$
$1,129$
Question 4:   Which of the following sets of numbers are the factors of  $136$ ?
$1,2,3,6,23,46,69,136$
$1,2,4,8,17,34,68,136$
$1,2,4,16,32,64,136$
$1,2,3,6,7,18,42,136$
Question 5:   Which of the following sets of numbers are prime numbers?
$73,157,801$
$71,141,547$
$33,701,727$
$97,739,883$
Question 6:   Which of the following sets of numbers are factors of  $318$ ?
$1,3,54$
$2,3,53$
$3,6,57$
$2,6,51$
Question 7:   $11$ is a factor of which the following sets of numbers?
$121,187,880$
$111,154,187$
$77,144,165$
$110,166,231$
Question 8:   Which of the following sets of numbers are prime factors of  $486$ ?
3
$2,3,5$
$2,3$
$3,5$
Question 9:   Find LCM (the lowest common multiple) of  $88,99$
$396$
$1089$
$792$
$8712$
Question 10:   Find HCF (the highest common factor) of  $27$  and  $81$
$27$
$6$
$9$
$3$