digit

Everyday

1. A digit is one of the ten signs 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 that we use to write numbers. The number 47 has two digits. tree →
2. A digit is also a finger or a toe. tree →
3. «Digital» things work with numbers inside, like computers and digital clocks. tree →

In the lessons

In school maths: the signs that make up a number; problems ask about the tens digit, the ones digit, two-digit and three-digit numbers, the sum of the digits, or the largest number made from some digits; place value. In everyday life: a phone number or a PIN has digits; a digital clock shows the time in digits. Phrases: «two-digit number», «the tens digit», «single digits».

Examples

• Write the largest two-digit number. tree →
• The tens digit of 58 is 5. tree →
• Make a three-digit number using the digits 3, 7 and 1. tree →
• What is the sum of the digits of 246? tree →
• My PIN has four digits. tree →
• The temperature is in single digits today. tree →
• Humans have five digits on each hand. tree →
• A digital clock shows the time as digits. tree →

Note

There are 10 digits, 0 to 9, but every number can be written with them. Maths: names a place in a number, not an amount: in 58 the digit 5 stands for 50. Trap: «the digit 5» and «the number 5» are not the same thing; «two-digit» tells the size of a number (10 to 99), not that there are two of something.

In Jewish tradition

Interpretation: Readers of Sefer Yetzirah take the ten sefirot as the ten digits, which also stand for deeper spiritual powers. In the primary lessons: In school maths: the signs that make up a number; problems ask about the tens digit, the ones digit, two-digit and three-digit numbers, the sum of the digits, or the largest number made from some digits; place value. In everyday life: a phone number or a PIN has digits; a digital clock shows the time in digits. Phrases: «two-digit number», «the tens digit», «single digits».

Examples

• It should probably be understood on one level as a reference to the ten digits of the decimal numeral system, though as we shall see, these Sefirot Belimah are imbued with metaphysical significance beyond mere numerals. (Sefer Yetzirah, Sefaria community translation) tree →
• 7) Like Pythagoras, who taught that the digits inclusive number ten which are typified in Tetraktys, (Τετρακτὺς) namely: 1 plus 2 plus 3 plus 4 equal 10, and which comprise the whole arithmetical system of nature, etc. (Sefer Yetzirah, Kalisch 1877) tree →
• may say that tlie numeral system of the Sefer Yetzirah, con- sists of nine digits and the zero. (Mordell, The Origin of Letters and Numerals according to Sefer Yetzirah (1914)) tree →

Note

There are 10 digits, 0 to 9, but every number can be written with them. Maths: names a place in a number, not an amount: in 58 the digit 5 stands for 50. Trap: «the digit 5» and «the number 5» are not the same thing; «two-digit» tells the size of a number (10 to 99), not that there are two of something.