Interest Computations.

3 Nov 2023

Require the interest of $462.50 for one month and eighteen days at 6 per cent.

Short Method to Find the Interest of a Given Sum.

2 Nov 2023

In some respects this rule is superior to the well-known 60-day method of reckoning interest.

Table of Transposed Numbers.

1 Nov 2023

The transposition of figures is a frequent cause of errors in proving accounts and balance sheets.

The Canadian Interest Rule.

31 Oct 2023

This rule of computing interest appears in some Canadian text-books, and, though simply a modification of other rules, is worthy of notice.

Proof of Multiplication in Ten Seconds.

30 Oct 2023

The unitate of a number is the sum of its digits reduced to a unit.

How to Make Change.

29 Oct 2023

Accuracy and rapidity in counting out change can best be acquired by practice behind the counter or at the cash-desk.

Bank Discount.

28 Oct 2023

The time in bank discount is always the number of days from the date of discounting to the date of maturity.

The Lightning Calculator’s Addition.

27 Oct 2023

The operator writes a line of figures, then another, and so on.

Equation of Payments.

26 Oct 2023

The time for such payment is called the equated time.