JAMB Past Questions and Answers - Page 1454

7,266.

Calculate the salvage value of a tractor with a depreciation value of ₦10,580.00 and initial cost of ₦50,000 after a year of use

A.

₦10,580

B.

₦30,290

C.

₦39,420

D.

₦60,580

Correct answer is C

Salvage value is the estimated book value of an asset after depreciation is calculated.

Salvage value + Depreciation value = Cost price

Salvage value + 10,580 = 50,000

∴ Salvage value = 50,000 - 10,580

⇒ ₦39,420

7,267.

If 200 layers will consume 25kg of feed per day. Calculate the amount of feed consumed by a layer per day.

A.

0.25kg/day

B.

0.2kg/day

C.

0.5kg/day

D.

0.125kg/day

Correct answer is D

200 layers → 25kg/day
1 layer → x
∴  \(\frac{200}{1}\) = \(\frac{25}{x}\)

200x = 25

x = \(\frac{25}{200}\) = \(\frac{1}{8}\) = 0.125 kg/day

7,268.

If 100 pieces of pests is attacking an hectare of cocoa farm and 25% suddenly died while 40% of the remnant is sent for medical examination. What is the number of pest remaining?

A.

45

B.

50

C.

25

D.

75

Correct answer is A

25% of 100 = 25 pests

∴ Number of remnants = 100 - 25 = 75 pests

40% of 75 = 30 pests

Total pest remaining = 100 - (25 + 30) = 100 - 55 = 45 pests

7,269.

A condition in which a gene does not manifest observable characteristics in the presence of its dominant allele is known as

A.

Dominance

B.

Mutation

C.

Recessiveness

D.

Homozygosity

Correct answer is C

This condition is known as Recessiveness.

7,270.

Which of the weeds is dispersed by wind?

A.

Pig weed (Boerhavia diffusa)

B.

Goat weed (Ageratum conizoides)

C.

Hause thorns (Acanthospermum hispidum)

D.

Tridax (Tridax procumbeus)

Correct answer is D

Tridax procumbeus is dispersed by wind.