Question

how any significant figure are present in 2pens​

Answer 1

$\huge{ \underline{ \bold{ᴀɴsᴡᴇʀ....{ \heartsuit}}}}$

ʟᴇᴀᴅɪɴɢ ᴢᴇʀᴏ : ᴅᴏ ɴᴏᴛ ᴄᴏᴜɴᴛ ᴀs ᴀ sɪɢɴɪғɪᴄᴀɴᴛ ғɪɢᴜʀᴇ.

ᴇxᴀᴍᴘʟᴇ: 0.001(1 sɪɢɴɪғɪᴄᴀɴᴛ ғɪɢᴜʀᴇ), 0.2( sɪɢɴɪғɪᴄᴀɴᴛ ғɪɢᴜʀᴇ)

ᴄᴀᴘᴛɪᴠᴇ ᴢᴇʀᴏ: ᴀʟᴡᴀʏs ᴄᴏᴜɴᴛ ᴀs ᴀ sɪɢɴɪғɪᴄᴀɴᴛ ғɪɢᴜʀᴇ.

ᴇxᴀᴍᴘʟᴇ: 709 (3 sɪɢɴɪғɪᴄᴀɴᴛ ғɪɢᴜʀᴇs)

ᴛʀᴀɪʟɪɴɢ ᴢᴇʀᴏ: ᴄᴏᴜɴᴛs ᴀs ᴀ sɪɢɴɪғɪᴄᴀɴᴛ ғɪɢᴜʀᴇ ɪғ ᴛʜᴇ ɴᴜᴍʙᴇʀ ᴄᴏɴᴛᴀɪɴs ᴀ ᴅᴇᴄɪᴍᴀʟ ᴘᴏɪɴᴛ. ʜᴏᴡᴇᴠᴇʀ, ɪᴛ ᴅᴏᴇs ɴᴏᴛ ᴄᴏᴜɴᴛ ɪғ ᴛʜᴇ ɴᴜᴍʙᴇʀ ᴅᴏᴇs ɴᴏᴛ ᴄᴏɴᴛᴀɪɴ ᴀ ᴅᴇᴄɪᴍᴀʟ ᴘᴏɪɴᴛ.

ᴇxᴀᴍᴘʟᴇ: 50.00(4 sɪɢɴɪғɪᴄᴀɴᴛ ғɪɢᴜʀᴇs), 50 ( sɪɢɴɪғɪᴄᴀɴᴛ ғɪɢᴜʀᴇ), 50. (2 sɪɢɴɪғɪᴄᴀɴᴛ ғɪɢᴜʀᴇs).