Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 878 · 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.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 9 PM (c) not enough info (d) 8 PM
2. 2.🧩 Rohan bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) not enough info (c) ₹20 (d) ₹25
3. 3.🧩 Tara is 11 years old. Vihaan is 2 years older than Tara. How old is Vihaan? (a) 13 (b) not enough info (c) 2 (d) 14
4. 4.📝 What does “evidence” mean? (a) a loud opinion (b) a guess (c) facts that support it (d) a rumour
5. 5.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 6 PM (c) 2 PM (d) not enough info
6. 6.🧩 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
7. 7.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 8 (b) 4 (c) 40 (d) not enough info
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
10. 10.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
11. 11.🧩 Ishaan bought 4 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) ₹80 (c) ₹20 (d) not enough info
12. 12.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 8 PM (b) not enough info (c) 7 PM (d) 6 PM
13. 13.🧩 Meera is 7 years old. Rohan is 9 years older than Meera. How old is Rohan? (a) not enough info (b) 9 (c) 17 (d) 16
14. 14.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
15. 15.🧩 A box of laddoos has 9 in each row. How many laddoos are in the box? (a) not enough info (b) 90 (c) 18 (d) 9
16. 16.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
17. 17.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
18. 18.🥭 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) no mango is sweet (c) yes, mangoes match (d) no, check more
19. 19.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
20. 20.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
21. 21.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
22. 22.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
23. 23.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
24. 24.🧩 Arjun is 10 years old. Vihaan is 2 years older than Arjun. How old is Vihaan? (a) not enough info (b) 2 (c) 13 (d) 12
25. 25.🧩 Ananya bought 2 balls for ₹120 in all. Each ball cost the same. What did one ball cost? (a) ₹60 (b) ₹120 (c) ₹65 (d) not enough info
26. 26.📊 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
27. 27.🧩 Vihaan is 10 years old. Diya is 5 years older than Vihaan. How old is Diya? (a) 15 (b) not enough info (c) 16 (d) 5
28. 28.🧩 Aarav bought 6 notebooks and a bag for ₹250 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹244 (c) ₹41 (d) ₹250
29. 29.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
30. 30.🧩 Ishaan is 9 years old. Aarav is 8 years older than Ishaan. How old is Aarav? (a) 8 (b) not enough info (c) 17 (d) 18
31. 31.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
32. 32.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
33. 33.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
34. 34.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
35. 35.🧩 Meera is 10 years old. Arjun is 5 years older than Meera. How old is Arjun? (a) 16 (b) 5 (c) not enough info (d) 15
36. 36.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
37. 37.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 8 PM (d) not enough info
38. 38.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
39. 39.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
40. 40.🧩 A box has 7 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 35 (b) not enough info (c) 40 (d) 12

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