Max's cell phone plan charges a monthly "pay-as-you-go rate" of $0.13 for each text message sent or received. If Max was charged $7.41 for 15 more sent texts than he received, how many texts did Max send?

last week, Ben, Kaltiyn, and Emily sent a total of 394 text messages from their cell phones. Kaitlyn sent 50% moer text messages than Ben, and Ben sent 30 fewer messages than emily. How many text message did kaitlyn send?

A text messaging plan charges a flat fee of $5 per month for up to 100 text messages sent plus $0.25 for each additional text message sent that month. Which of the following graphs represents the cost, y, of sending x texts in a month?

For her mobile phones service Divya pays Rs 145 per month and 75 paise for each extra minutes in the monthly plan. She received a bill of Rs 178 last month . How many extra minutes did she use her phone beyond the allowed time.

The spy sent Tintin four messages which consists of only the letters from A to D, that are encoded in the following way: A, B, C, D are equivalent to 00, 01, 10, 11 respectively. An operation ‡ is defined over the numbers 0 and 1 as All messages that Tintin receives are encoded as (Message) ‡ (Key) where Key is a fixed word that is used for encoding all the Messages. But, sadly, Tintin does not know the key. BDBDBD, AAAA, BDBBBB, DAACCC . You forgot the messages corresponding to these encodings but you do remember that all of these four messages had ADC as its substring. Few seconds later, Tintin receives another message that was encoded as BBDBD. Can you tell what the actual message could possibly be? Not clear? Want an example – let us have two messages AB and CD, and let the key be BC, then (({:(" "AB),(+BC):})/(BD))/ (({:(" "CD),(+BC):})/(DB))/ are the corresponding cypher texts. [Hint: if ("word"1)‡("word"2)=("word"3) " then " ("word"1)=("word"2)‡("word"3)]