Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 700 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
2. 2.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 9 PM (c) 6 PM (d) 8 PM
3. 3.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
4. 4.🧩 Diya is 6 years old. Rohan is 9 years older than Diya. How old is Rohan? (a) 15 (b) not enough info (c) 9 (d) 16
5. 5.🧩 Meera bought 4 markers for ₹120 in all. Each marker cost the same. What did one marker cost? (a) ₹35 (b) ₹120 (c) ₹30 (d) not enough info
6. 6.🧩 A box of mangoes has 7 in each row. How many mangoes are in the box? (a) 70 (b) 14 (c) 7 (d) not enough info
7. 7.🧩 Diya is 12 years old. Meera is older than Diya. How old is Meera? (a) 14 (b) 17 (c) not enough info (d) 13
8. 8.🧩 Saanvi is 6 years old. Arjun is 5 years older than Saanvi. How old is Arjun? (a) not enough info (b) 5 (c) 11 (d) 12
9. 9.🧩 Arjun is 11 years old. Diya is 3 years older than Arjun. How old is Diya? (a) 15 (b) not enough info (c) 3 (d) 14
10. 10.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) yes, mangoes match (c) no mango is sweet (d) no, check more
11. 11.🧩 Vihaan bought 4 markers for ₹100 in all. Each marker cost the same. What did one marker cost? (a) ₹30 (b) not enough info (c) ₹25 (d) ₹100
12. 12.🧩 Tara bought 6 pens for ₹150 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹150 (c) ₹30 (d) ₹25
13. 13.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
14. 14.🧩 A box has 3 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 20 (b) 8 (c) not enough info (d) 15
15. 15.🧩 A box has 4 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 11 (b) 35 (c) 28 (d) not enough info
16. 16.🧩 Aarav bought 5 balls and a water bottle for ₹270 in all. Each ball cost the same. What did one ball cost? (a) ₹270 (b) ₹54 (c) not enough info (d) ₹265
17. 17.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
18. 18.🧩 Saanvi bought 2 balls and a lunch box for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹140 (b) not enough info (c) ₹138 (d) ₹70
19. 19.🧩 Kabir bought 5 mangoes and a cap for ₹265 in all. Each mango cost the same. What did one mango cost? (a) ₹53 (b) ₹260 (c) ₹265 (d) not enough info
20. 20.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
21. 21.🧩 A box has 3 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 21 (b) not enough info (c) 10 (d) 28
22. 22.🧩 Diya bought 6 kites for ₹240 in all. Each kite cost the same. What did one kite cost? (a) ₹40 (b) not enough info (c) ₹240 (d) ₹45
23. 23.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
24. 24.🧩 A box has 7 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 56 (b) 14 (c) 49 (d) not enough info
25. 25.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
26. 26.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 60 (b) 6 (c) 12 (d) not enough info
27. 27.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
28. 28.🧩 Meera is 10 years old. Kabir is 2 years older than Meera. How old is Kabir? (a) 2 (b) 13 (c) not enough info (d) 12
29. 29.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
30. 30.📝 What does “evidence” mean? (a) facts that support it (b) a guess (c) a rumour (d) a loud opinion
31. 31.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
32. 32.🧩 A box has 7 rows of apples, with 7 in each row. How many apples are in the box? (a) not enough info (b) 14 (c) 56 (d) 49
33. 33.🧩 Aarav is 7 years old. Arjun is 3 years older than Aarav. How old is Arjun? (a) 11 (b) 10 (c) 3 (d) not enough info
34. 34.🧩 Vihaan bought 6 mangoes and a cap for ₹330 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹330 (c) ₹324 (d) ₹55
35. 35.🧩 Meera bought 2 mangoes and a water bottle for ₹60 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹58 (c) ₹60 (d) ₹30
36. 36.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
37. 37.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) not enough info (b) 8 PM (c) 6 PM (d) 7 PM
38. 38.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
39. 39.🧩 Rohan is 7 years old. Saanvi is 2 years older than Rohan. How old is Saanvi? (a) 10 (b) not enough info (c) 2 (d) 9
40. 40.🧩 Saanvi bought 2 mangoes for ₹110 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹110 (c) ₹60 (d) ₹55

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