North Korean troops were working under _______________on the roads on its side of the border near the west and east coasts that are likely preparations to ______________the roads.
"Camouflage" fits the context of troops working covertly on the roads, suggesting concealment. "Blow up" is the appropriate phrase for destroying roads, matching the likely military preparation mentioned in the sentence. The other options do not match the intended meaning. For instance, "surveillance" and "build" don't reflect destruction, and "construction" and "fortify" imply protection rather than demolition.
The greatest number that will divide 398, 437 and 5425 leaving 7, 12 and 2 as remainders, respectively, is:
Find the remainder when 2722 is divided by 729.
Find the greatest number that will divide 49, 147 and 322 to leave the same remainder in each case.
What will be the remainder when 742 is divided by 48?
How many factors of 23 × 33 × 54 × 73 are divisible by 50 but not by 100.
Find the quotient of 0.36 ÷ 0.48 (correct to three decimal places).
Find the remainder when 413 is divided by 5.
Find the largest number that divides 400, 500, and 600, leaving remainders 10, 20, and 30 respectively.
When a natural number 'n' is divided by 4, the remainder is 3. What will be the remainder when (2n + 3) is divided by 4?
