Question

Which of the following is not equal 225 g?
A. 0.225 kg
B. 22,500 cg
C. 2.25 dkg
D. 2250 dg

Answer 1

g to dkg is 1 place to the right, move the decimal point 1 place to the left 
225 g = 22.5 dkg 
C is the answer

Answer 2

Answer: C) 2.25 dkg

Explanation: 1 kg = 1000 g

A) $0.225kg(\frac{1000g}{1kg})$  = 225 g

B) cg stands for centigrams. 1 g = 100 cg

So, $22500cg(\frac{1g}{100cg})$   = 225 g

C) dkg stands for decagrams. dag is also used in place of dkg which also means decagram.

1 dkg = 10 g

$2.25dkg(\frac{10g}{1dkg})$  = 22.5 g

D) dg stands for decigram.

1 g = 10 dg

$2250dg(\frac{1g}{10dg})$  = 225 g

On converting all the given mass units to grams, we see that it's choice C which is not equal to 225 g and so it is the right choice.