Elitmus Exam Category

1/a + 1/b = 1 /c where a is single digit greater than 2 and a b and c are whole numbers .then what is possible value of(a,b)for this equation.
a.0 b.4 c. d.>5

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Elitmus Other Question

ABCD is a quadrilateral. then it's a parallelogram
1. angle ABC= 90
2. angle ADC=90
a) solve by any statement
b) solve only by one not by other
c) both required
d) not any is sufficient
options:-
1. a 2. b 3. c 4. d
two friends suppose A and B run on circular track in clockwise and anti- clockwise direction respectively . A runs 1 km in 4 minutes. What should be the speed of B so that they meet 24 times in 45 minutes.
1. 17 2. 18
other options I not remember.