Select the number that can replace the question mark (?) in the following equation.
? + \( \frac{18}{24} \) + 3 \( \frac{3}{4} \) = 23 \( \frac{13}{24} \)
19 \( \frac{13}{24} \)
19 \( \frac{11}{24} \)
1
19 \( \frac{1}{24} \)
Find the HCF of (345 − 1) and (335 − 1).
If the average of a1, a2, a3 and a4 is 19.5, a1 = 21 and the average of a1, a2 and a3 is equal to the average of a1, a3 and a4, then what will be the value of a4?
If we increase 50% of numerator and 80% of denominator of a fraction, then what fraction of the original will be the new fraction?
\( \frac{6}{5} \)
\( \frac{5}{6} \)
\( \frac{5}{8} \)
\( \frac{7}{9} \)