Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 883 · 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) the colour of ink (d) what facts are given
2. 2.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, mangoes match (c) yes, it is certain (d) no, check more
3. 3.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
4. 4.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
5. 5.🧩 Tara bought 6 pens and a cap for ₹210 in all. Each pen cost the same. What did one pen cost? (a) ₹210 (b) ₹35 (c) ₹204 (d) not enough info
6. 6.🧩 Ananya bought 6 balls for ₹60 in all. Each ball cost the same. What did one ball cost? (a) ₹15 (b) not enough info (c) ₹10 (d) ₹60
7. 7.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
8. 8.📝 What does “evidence” mean? (a) a guess (b) facts that support it (c) a rumour (d) a loud opinion
9. 9.🧩 Vihaan bought 4 kites and a water bottle for ₹240 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹240 (c) ₹236 (d) ₹60
10. 10.🧩 A box of laddoos has 7 in each row. How many laddoos are in the box? (a) 14 (b) not enough info (c) 7 (d) 70
11. 11.🧩 Saanvi is 12 years old. Vihaan is older than Saanvi. How old is Vihaan? (a) 14 (b) not enough info (c) 17 (d) 13
12. 12.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
13. 13.🧩 Diya bought 4 pens for ₹40 in all. Each pen cost the same. What did one pen cost? (a) ₹15 (b) not enough info (c) ₹40 (d) ₹10
14. 14.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking the whole class (d) asking one friend
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
16. 16.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
17. 17.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
18. 18.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
19. 19.🧩 Kabir bought 2 mangoes and a cap for ₹110 in all. Each mango cost the same. What did one mango cost? (a) ₹110 (b) ₹108 (c) not enough info (d) ₹55
20. 20.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Meera bought 6 pens for ₹300 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹50 (c) ₹55 (d) ₹300
22. 22.🧩 A box has 3 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 36 (b) not enough info (c) 27 (d) 12
23. 23.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
24. 24.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 80 (b) not enough info (c) 8 (d) 16
25. 25.🐕 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
26. 26.🧩 Kabir bought 2 markers and a water bottle for ₹180 in all. Each marker cost the same. What did one marker cost? (a) ₹178 (b) ₹180 (c) ₹90 (d) not enough info
27. 27.🧩 A box has 8 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 16 (b) 64 (c) 72 (d) not enough info
28. 28.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
29. 29.🧩 Diya is 10 years old. Ishaan is older than Diya. How old is Ishaan? (a) 11 (b) 15 (c) not enough info (d) 12
30. 30.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
31. 31.🧩 Saanvi bought 5 kites and a water bottle for ₹195 in all. Each kite cost the same. What did one kite cost? (a) ₹190 (b) ₹195 (c) ₹39 (d) not enough info
32. 32.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) 6 PM (c) not enough info (d) 7 PM
33. 33.🧩 Saanvi is 12 years old. Ananya is older than Saanvi. How old is Ananya? (a) 13 (b) 14 (c) 17 (d) not enough info
34. 34.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
35. 35.🧩 Vihaan bought 6 pens and a lunch box for ₹290 in all. Each pen cost the same. What did one pen cost? (a) ₹48 (b) ₹290 (c) not enough info (d) ₹284
36. 36.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 2 PM
37. 37.🧩 A box has 8 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) not enough info (b) 45 (c) 13 (d) 40
38. 38.🧩 Meera is 11 years old. Saanvi is 7 years older than Meera. How old is Saanvi? (a) 7 (b) 19 (c) not enough info (d) 18
39. 39.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
40. 40.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False

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