- A42
- B12
- C168
- D84
Step-by-Step Solution
Work in centimetres: 336, 504 and 756. The longest rod is HCF(336, 504, 756). 7 and 7, so HCF = cm. Answers 42 and 12 are common factors but not the greatest; 168 does not divide 756.
Answer: D) 84
A carpenter has three planks measuring 3 m 36 cm, 5 m 4 cm and 7 m 56 cm. He wants the longest possible measuring rod that measures each plank an exact number of times.
What is the length of that rod (in cm)?
Class 10HCF and LCMNumber Systems
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All HCF and LCM practice questions
More Class 10 HCF and LCM practice
A hall floor is 7 m 92 cm long and 5 m 40 cm broad. It is to be paved with identical…Three rolls of craft tape measure 105 cm, 175 cm and 210 cm. They are cut into equal…A nursery in Ranchi has 136 neem saplings and 306 ashoka saplings. They are planted in…A publisher packs 928 novels and 1160 workbooks into cartons. Every carton must hold…A teacher shares 130 pencils and 205 erasers equally among the largest possible number…