One of the cubes, say, B, should have digits 0 to 5, and the other, say A, should have digits 0, 1, 2, 6, 7, 8.

With this,
Dates 1 to 5 can be represented with 0 from cube A and 1 to 5 from cube B;
Dates 6 to 8 can be represented with 0 from cube B and 6, 7, 8 from cube A;
Date 9 can be represented through a ‘trick’ – using 0 of Cube B and 6 from Cube A turned ‘upside down’.
Date 10 can be shown with 1 and 0 from either cube;
Date 11 can be made of 1s from both cubes;
Date 12 to 15 can be made from 1 of cube A and 2 to 5 of cube B;
Dates 16 – 19 can be represented similar to dates 6 – 9 by replacing the 0 with 1 from cube B;
Dates 20, 21: 2 and 0 / 1 from either cube;
Dates 22 – 25 can be made similar to dates 12 to 15, replacing the 1 with 2 from cube B;
Dates 26 – 29 can be done similar to 16 – 19;
Dates 30 and 31: Use 3 from cube  B and 0 and 1 of cube A.

15

Logic: Cost = No. of letters in the word x 3

orange (6 letters) => 6 x 3 = 18,
pineapple (9 letters) => 9 x 3 = 27,
grape (5 letters) => 5 x 3 = 15

MANGO: 5 letters => 5 x 3 = 15

A, W

W A T N T L I T F S A W

Answer: ZERO…!

Multiply it by ANY number – not just multiples of 9 – the result will remain the same single-digit number, 0.

Diamond Ring?!

A “puzzle” based on a famous story?!

From the viewpoint of the miser, the bank’s custody is the safest ‘parking space’ he could get for his super-luxury car, a the cheapest cost – he’s a miser, after all!  (Well, don’t ask how a ‘miser’ could be such a spendthrift to own a luxury car worth $80K…!)

A MIRROR IMAGE / REFLECTION!

You can be any sort of trap OR, if natural, can be a whirlpool or quicksand or anything of similar nature.

Y (WHY…?!)

The question is faulty in its present form. It is stated as “If you move one chocolate from P to Q, the number of chocolates on B will become twice the number of chocolates in A” whereas the jars are ‘labeled as P and Q‘.  How does ‘A’ and ‘B’ come into the picture?  It seems that A and B should have been P and Q respectively.

With this assumption, the solution is P = 5 and Q = 7.  (5 – 1 = 4 = 2 x (7 + 1); (7 – 1) = (5 + 1)

Explanation:

If you move one chocolate from P to Q, the number of chocolates on Q will become twice the number of chocolates in P =>  (P – 1) x 2 = Q + 1
If you move one chocolate from Q to P, the number of chocolates in both jars will become equal =>  Q – 1 = P + 1

Solving the above two, we get Q = 7 and P = 5.